MPS registers extension after project open

inspection view: drop problem counter cache if parent node was excluded/included in case of unused declaration inspection

Before the change YYINITIAL state was returned from lexer even with non-empty braces stack, which was leading to
different token types after reparse. After the change YYINITIAL is returned only outside of parentheses/brackets.
Also added assertions for ensuring that initial state is never pushed on/popped from states stack.

1. Support deparenthesizing in UnnecessaryConstantArrayCreationExpressionInspection; remove from exceptions
2. Link to IDEA-179081
3. Pull up shouldSkipByFamilyName
4. Explanatory comment on skipping elements with start offset equals to caret position

Tests of a plugin may depends on code from optional dependencies of that plugin so we need to enable such depedencies when running tests.

RedundantExplicitCloseInspection: support parentheses in close(); fixed support of resource expression; check field qualifiers

It no longer rejects paths with symlinks/junctions, but checks that they do not point to UNC paths.